The pair were tested internally by the Pakistan Cricket Board as part of their requirements prior to the tournament in India.

Pakistan are due to play their first game against Sri Lanka in Jaipur on Tuesday.

International Cricket Council chief executive Malcolm Speed told BBC Radio Five Live: “They were tests conducted by the PCB three weeks ago. They do this before each event.

“They weren’t recreational drugs but that is all I can say at this stage.”

The news comes after a turbulent couple of months for Pakistan cricket following The Oval ball-tampering fiasco, board upheaval and the resignation and re-appointment of Younis Khan as stand-in captain.

Pakistan coach Bob Woolmer told Indian station NDTV: “The events have happened very fast. We haven’t been able to discuss this as a team yet.

“Our job is to put behind us all the distractions and concentrate on playing the game against Sri Lanka. We want to make sure we get the two points.”